CIMO - Publicações em Proceedings Indexadas à WoS/Scopus
URI permanente para esta coleção:
Navegar
Percorrer CIMO - Publicações em Proceedings Indexadas à WoS/Scopus por título
A mostrar 1 - 10 de 228
Resultados por página
Opções de ordenação
- Absence from work and job satisfaction: a case study developed in the municipality of Bragança, PortugalPublication . Ribeiro, Maria Isabel; Fernandes, António; Lopes, Isabel MariaAbsence from work has a direct impact on the quality of the service provided by the council to its citizens. The aim of this research is to analyse the correlation between work absenteeism at the Town Council of Bragança and job satisfaction; identify factors concerning the type of work as well as the worker’s attitudes, behaviours and values which may be correlated to job satisfaction. To achieve these objectives, it was developed a quantitative, observational and cross-sectional study involving a survey conducted among the workers of a medium-sized municipality located in the northeast of Portugal. The correlations were tested by using Spearman’s statistic test for a level of significance of 5%. From the 71 workers surveyed, 28 had already been absent from their workplace. The main causes stated by workers to justify their absence were sickness, short (14.1) and long-term (7%), family caregiving (12.7%), and others (8.5%). The existence of a correlation between absenteeism and job satisfaction was not proved. However, correlations were observed between job satisfaction and type of work (Sig.<.05). Although no statistically significant correlation was found between job satisfaction and absenteeism, there are some factors associated with the type of work and with workers’ attitudes, behaviours and goals which showed to be correlated to job satisfaction. Therefore, it is recommendable that middle and executive managers continue to improve such conditions so as to increase the productivity, quality and efficiency of the service provided to citizens by council workers.
- Academic self-efficacy in Portuguese public higher education studentsPublication . Ribeiro, Maria Isabel; Fernandes, António; Fernandes, António PedroAcademic self-efficacy refers to the belief of an individual successfully attaining an academic task or achieving a specific academic goal. Self-efficacy is critical to student success because it influences the choices students make along their academic and professional path. This study aimed to determine the level of academic self-efficacy in higher education students and to verify if there were differences statistically significant, taking into account the sociodemographic variables, namely, gender, age and nationality, and the academic variables, such as scientific area, degree, course year, course with or without integrated internship and attendance regimen. To achieve these objectives, an observational, cross-sectional, quantitative and analytical study was carried out based on a random sample of 2152 individuals from a total of 8200 students enrolled, in the 2018/2019 school year, in a public higher education institution located in the Northern of Portugal. The margin of error was 1.81%. The students were aged between 17 and 52 years old. The students registered a moderate level (4.42 ± 0.092) of academic self-efficacy out of 7. It was observed that 45.5% of the students registered a high level of academic self-efficacy; 17.9% revealed a low level; and the remaining 36.6% showed a moderate level. Statistically significant differences were found in academic self-efficacy taking into account the nationality of students (p-value = 0.041). The foreign students registered a highest academic selfefficacy level. Additionally, the comparison analysis demonstrated that there were significant differences between the students' scientific area (p-value = 0.004) and attendance regimen (p-value = 0.043). It was the Technology and Management students as well as the worker students who had the highest levels of academic self-efficacy. Nationality, scientific area and attendance regimen showed to be differentiator factors of academic self-efficacy. Foreigner students, worker students and students from the technology and management scientific area showed more confidence to achieve their academic goals. In fact, students’ confidence in succeeding in their academic assignments will affect their lifelong learning. Therefore, higher education institutions should be able to improve the academic self-efficacy of students, creating innovative learning environments adapted to the needs and knowledge of their students.
- Adaptive collocation methods for the solution of partial differential equationsPublication . Brito, Paulo; Portugal, AntónioAn integration algorithm that conjugates a Method of Lines (MOL) strategy based on finite differences space discretizations, with a collocation strategy based on increasing level dyadic grids is presented. It reveals potential either as a grid generation procedure and a Partial Differential Equation(PDE) integration scheme. It copes satisfactorily with a example characterized by a steep travelling wave and a example that presented a forming steep shock, which demonstrates its versatility in dealing with different types of steep moving front problems, exhibiting features like advection-diffusion, widely common in the standard Chemical Processes simulation models.
- AFINA-te - a healthy lifestyle information website, online food diary and exercise log directly towards childrenPublication . Guimarães, Nuno; Ferro-Lebres, Vera; Ribeiro, JoséChildhood obesity is according to the World Health Organization one of the most concerning problems today. Educating children to a healthier lifestyle is a difficult task due to the lack of interest or concern that they demonstrate. The interest that children have in technology and the time they spent online in games or simply surfing the web may be seen as an opportunity to instill knowledge about healthy eating and healthy lifestyle. There are already several online health counseling websites but it seems to exist a lack of such platforms directly towards to children. Afina-te website is an online platform that aims to monitor and educate children to a healthier lifestyle through the exposition of information, interactive applications and educational games. It is also capable of provide feedback about what users eat and the exercise they practice. This paper describes the development and resulting health counseling website.
- Almond orchard management using multi-temporal UAV data: a proof of conceptPublication . Guimaraes, Nathalie; Padua, Luis; Sousa, Joaquim J.; Bento, Albino; Couto, PedroIn the last decade Unmanned Aerial Systems (UAS) have become a reference tool for agriculture applications. The integration of multispectral sensors that can capture near infrared (NIR) and red edge spectral reflectance allows the creation of vegetation indices, which are fundamental for crop monitoring process. In this study, we propose a methodology to analyze the vegetative state of almond crops using multi-temporal data acquired by a multispectral sensor accoupled to an Unmanned Aerial Vehicle (UAV). The methodology implemented allowed individual tree parameters extraction, such as number of trees, tree height, and tree crown area. This also allowed the acquisition of Normalized Difference Vegetation Index (NDVI) information for each tree. The multitemporal data showed significant variations in the vegetative state of almond crops.
- An IoT approach for animals trackingPublication . Zorawski, Matheus; Brito, Thadeu; Castro, José; Castro, João Paulo; Castro, Marina; Lima, JoséPastoral activities bring several benefits to the ecosystem and rural communities. These activities are already carried out daily with goats, cows and sheep in Portugal. Still, they could be better applied to take advantage of their benefits. Most of these pastoral ecosystem services are not remunerated, indicating a lack of making these activities more attractive to bring returns to shepherds, breeders and landowners. The monitoring of these activities provides data to value these services, besides being able to indicate directly to the shepherds’ routes to drive their flocks and the respective return. There are devices in the market that perform this monitoring, but they are not adaptable to the circumstances and challenges required in the Northeast of Portugal. This work addresses a system to perform animals tracking, and the development of a test platform, through long-range technologies for transmission using LoRaWAN architecture. The results demonstrated the use of LoRaWAN in tracking services, allowing to conclude about the viability of the proposed methodology and the direction for future works.
- Análise da utilização das ferramentas da gestão florestal FlorNext® e FlorNext Pro® e do seu possível impacto na gestão florestal do Nordeste TrasmontanoPublication . Fagundes, Marcelo; Nunes, Luís; Azevedo, João; Pérez-Rodríguez, FernandoO Nordeste Transmontano vem sofrendo nas últimas décadas, abandono nas zonas rurais como consequência acontece o défice ao nível da gestão florestal praticada. Neste contexto, a estratégia levada a cabo na região para promover boas práticas de gestão florestal, fez o IPB e seus investigadores desenvolverem ferramentas informáticas para o apoio nas decisões relativas à gestão das florestas dirigidas a diferentes tipos de utilizadores: FlorNExT ® e FlorNExT Pro®. O FlorNExT® é uma ferramenta disponibilizada na internet de forma livre que simula o crescimento e a produção de povoamentos de pinheiro bravo e carvalho negral enquanto o FlorNext Pro®, é uma aplicação de ambiente de trabalho dirigida a técnicos com amplos conhecimentos de gestão florestal, que permite gerir um conjunto de parcelas em base nas metodologias de análise com multiobjetivos. Contudo, o desenvolvimento das ferramentas não é suficiente para garantir que a partilha de conhecimento com origem em grupos de investigação na forma de aplicações informáticas de apoio a gestão florestal promove a aplicação de boas práticas e aumenta a mobilização de madeira na região. Torna-se neste contexto necessário monitorizar a utilização destas ferramentas, assim como reforçar e consolidar os veículos para partilha deste tipo de conhecimento. O presente trabalho mostra uma análise baseada na opinião dos potenciais agentes envolvidos no uso de cada uma das ferramentas desenvolvidas, com base na aplicação do Processo Analítico Hierárquico (AHP em inglês), através de inquéritos aplicando esta metodologia para análise dos resultados, com o intuito de obter indicadores, sobre o possível impacto das ferramentas desenvolvidas na gestão florestal da região. Para a aplicação e extração de dados estabeleceu-se uma série de eventos como workshops, cursos e reuniões de difusão de informação e tecnologia para diferentes perfis de utilizadores, assim como se fomentaram debates para a identificação de barreiras e sugestões de melhoria dos veículos para partilha de conhecimento dos grupos de investigação aos utilizadores finais ou gestores florestais. Como resultados preliminares do trabalho em curso, apresentam-se tendências observadas e previstas de utilização das ferramentas na região, e os pontos fortes e fracos deste tipo de desenvolvimentos para a gestão florestal na região do Nordeste Trasmontano.
- Analysis of climate change indices in relation to wine production: a case study in the Douro region (Portugal)Publication . Blanco-Ward, Daniel; Monteiro, Alexandra; Lopes, Myriam; Borrego, Carlos S.; Silveira, Carlos; Viceto, Carolina; Rocha, Alfredo; Ribeiro, A.C.; Andrade, João Verdial; Feliciano, Manuel; Castro, João Paulo; Barreales, David; Carlos, Cristina; Peixoto, Carlos; Miranda, Ana IsabelClimate change is of major relevance to wine production as most of the wine-growing regions of the world, in particular the Douro region, are located within relatively narrow latitudinal bands with average growing season temperatures limited to 13–21◦C. This study focuses on the incidence of climate variables and indices that are relevant both for climate change detection and for grape production with particular emphasis on extreme events (e.g. cold waves, storms, heat waves). Dynamical downscaling ofMPI-ESM-LR global data forced with RCP8.5 climatic scenario is performed with the Weather Research and Forecast (WRF) model to a regional scale including the Douro valley of Portugal for recent-past (1986–2005) and future periods (2046– 2065; 2081–2100). The number, duration and intensity of events are superimposed over critical phenological phases of the vine (dormancy, bud burst, flowering, v´eraison, and maturity) in order to assess their positive or negative implications on wine production in the region. An assessment on the statistical significance of climatic indices, their differences between the recent-past and the future scenarios and the potential impact on wine production is performed. Preliminary results indicate increased climatic stress on the Douro region wine production and increased vulnerability of its vine varieties. These results will provide evidence for future strategies aimed to preserve the high-quality wines in the region and their typicality in a sustainable way.
- Analysis of phenolic compounds in flowers from wild medicinal plants from northeastern Portugal.Publication . Barros, Lillian; Dueñas, Montserrat; Carvalho, Ana Maria; Ferreira, Isabel C.F.R.; Santos-Buelga, CelestinoThis study aimed to analyse phenolic compounds in wild medicinal flowers of Crataegus monogyna, Cytisus multiflorus, Malva sylvestris and Sambucus nigra, by HPLC-DAD-ESI/MS. Flavonols and flavones were the main groups in almost all the studied samples. C. multiflorus sample gave the highest levels of flavonoids, being a chrysin derivative the most abundant flavone. C. monogyna revealed the highest concentration in phenolic acids that were not found in C. multiflorus; 5-O-caffeoylquinic acid was the most abundant phenolic acid found in the first species, being a procyanidin trimer also found. Kaempferol-3-O-rutinoside and quercetin-3-O-rutinoside were the main flavonols present in M. sylvestris and S. nigra, respectively. The studied flowers could be selected for processing extracts with health-promoting properties or to be incorporated into functional beverages or products with bioactive properties related to oxidative stress.
- Analysis of phenolic, polysaccharidic and lipidic fractions of mushrooms from northeast PortugalPublication . Heleno, Sandrina A.; Barros, Lillian; Martins, Anabela; Queiroz, Maria João R.P.; Santos-Buelga, Celestino; Ferreira, Isabel C.F.R.Mushrooms consumption continues to increase due to their functional benefits and presence of bioactive compounds. Herein, phenolic, polysaccharidic and lipidic fractions of wild mushrooms from Northeast Portugal (Coprinopsis atramentaria, Lactarius bertillonii, Lactarius vellereus, Rhodotus palmatus and Xerocomus chrysenteron) were analysed. Protocatechuic, phydroxybenzoic, p-coumaric and cinnamic acids were found in the phenolic fraction; ramnose, xylose, fucose, arabinose, fructose, glucose, manose, mannitol, sucrose, maltose and trehalose were quantified in polysaccharidic fraction; linoleic and stearic (only in Lactarius sp.) acids, and β- and γ-tocopherols were the main compounds in the lipidic fraction.